Air-cleaner



M. B. MORGAN.

MR CLEANER.

APPLICATION FILED MAYL IQIQ.

Patented Feb. 8,1921.

,Ewemif Y fi mmdw air/1575 MATHEW B. MORGAN, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR TO THE CLEVELAND TRACTOR COMPANY,

AIR-CLEANER.

To all whom it may concern:

Be it known that T, MATHEW B. MORGAN, a citizen of the United States, residing at Cleveland Heights, in the county of Quyahoga' and State of Ohio, have invented a certain new and useful Improvement in Air- Cleaners, of which the following is a full, clear, and exact description. I,

This invention is an air cleaner especially adapted for use upon a motor vehicle for the purpose of extracting dust from the air which is passing to the carbureter of an internal combustion engine employed as the prime mover of said motor vehicle.

The invention consists in the construction and combination of parts shown in the drawings and hereinafter described and pointed out definitely in the appended'claims.

In the drawings, Figure 1 is a vertical longitudinal section of the air cleaner, and Fig, 2 is a front elevation thereof partly broken away.

The invention in the form shown in the drawing includes an outer air tube 12 which is open at both ends, and a shorter inner air tube 10 which is also open at both ends, and an air box 20 which surrounds the rear part of the outer air tube and takes air therefrom through openings in the wall of said air tube behind the rear end of the inner air tube.

The outer tube 12 is composed of a forwardly flaring front portion 12", and a rear portion 12", which flares outward toward its rear end. The inner tube 10 is arranged con centrically within the front portion 12*, and extends rearward to a point substantially in the same plane as that in which the front and rear portions of the outside tube are joined together. The diameter and shape of the tube 10 is such that at its rear end it is not much smaller than the ,sur-

rounding outer tube whereby a very thin annular space is left between them, and such that the annular space between the two tubes is wide at its front end and is of gradually increasing width to the rear end of the inner tube. T he two tubes are held in the relative positions shown by longitudinally extended wings 13 which extend across the space be tween the tubes and are connected with both; These Wings 13 not only hold the tubes in the requiredrelationship, but they also act to guide the air passing rearward through the annular space between the tubes and to Specification of Letters Patent.

Application filed May 7, 1919.

OF EUCLID, OHIO, A CORPORATION OF OHIO.

Patented Feb, 8, 1921.

Serial No. 295,397.

prevent it from acquiring a spiral or swirling motion.

The rear portion 12 of the outer tube, while it is of increasing diameter from the plane in which it is united to the rear end of the front tube is nevertheless of peculiar shape. It is made up of a plurality of short conical rings 15, 16, 17, 18, 19, which are so shaped and connected, that alternate rings are flaring in opposite directions. In those sections 15 and 17 which flare rearwardly are numerous air openings through which air may pass from the rear portion 12 of the outer tube into an air box 20 which sur-v rounds the outer tube, particularly that part thereof which has in its walls these air passages referred to, and preferably the conical rings 15 and 17 are formed of. fine wire screen. This air box 20 is made of thin metal, asindeed are all of the other parts of the device, and it is so connected around the air tube that air can not get into it except through the air openings referred to. in the wall of the outer tube. There is attached to this air box a pipe 21 through which air may be drawn from the air box; and this pipe 21 is to be attached to the air inlet of the carbureter of the engine.

In order that the described air cleaning device may function it is necessary that it be associated with means for forcibly blowing air into the front ends of the tubes 10 and 12. It is a matter of no consequence what means may be employed for this purpose. In fact if the described air cleaning device is placed under the hood of the motor vehicle behind the fan which is always to be found there, this fan will act to force the air through the air cleaning device at a velocity which will enable the device to properly perform its functions. 7

Owing to' the rapidly contracting area of the annular space between the two tubes, the

How of air which is blown into the front end not be deflected laterally through the air openings in the sections 15 and 17 ofthe surrounded. as it flows through the rear end of the air tube 12 by the thin annular high velocity air stream discharged from the space between the two air tubes.

Upon the suction strokes of the engine, air will be drawn through pipe 21 from the air box 20 thereby reducing the air pressure in that box, and causing a flow of air into the box through the air openingsln the walls 15 and 17 of air from the rear end of the outer tube 12. The air which does so flow into said box is required,'in so doing, to make a turn which is almost a reversal of its former path of movement. This air will come directly from the swift moving thin annular air stream, but will be substantially free from dust particles which, because of their weight and inertia can not be so deflected that they will not be drawn forward through the openings in the conical walls 15 and 17. Of course, the air taken from the swift moving air stream has to be replenished from the slow 'moving central air column. This central air column contains a good deal of dust, but as air taken from thiscolumn flows through or into the high velocity annular air stream, the latter will act as a strainer to take the dust out of the air and carry it rearward past the air openings in the rearwardly flaring conical walls 15 and 17 of said air tube.

From the foregoing it will be seen that the conical sections 15. and 17 which flare rearwardly and which contain the air passages, are so placed that it is not at all likely that any of the heavy dust particles in the swift moving annular air stream will be so far deflected out of the path in which they travel that they will go through the open ings in this conical section, and thence into the"'air box. It maybe that some dust particles will be slightly'deflected and drawn out of the air stream, but such particles as are so drawn out of the air stream will be thrown againstthe conical walls 16 and 18, which incline inwardly toward the rear, and these sections will guide this dust back into the air stream and past the perforated walls of the sections 15 and 17.

Having described my invention, I claim 1. In an air strainer, the combination of two concentric'tubes arranged'one within the other, the outer tube having an extension rearward beyond the rear end of the inner tube and having air discharge openings through said rearward extension,means for causlng a swift moving annular air stream to be discharged from the rear end of the annular space between the two tubes,

memes I end whose walls are made up\of alternately placed oppositely inclined conical rings,-

certain of the rearwardly flaring rings having air passages through them, an air box around the part of the tube in which the air passages are, means to connect said air box with a carbureter, and means for discharging into the front end of said rearwardly flaring tube adjacent its walls a thin annular high velocity air stream. a

3. In an air cleaner, the combination of an air tube having a forwardly flaring front end, the walls of the rear end of said tube having air passages through -it,- an inner tube arranged concentrically within the forwardly flaring front end of the outer air tube,which inner air tube is of such shape that the annular space between the tubes is of decreasing width from the front to the rear end thereof, anair box around that part of the other tube in which the air passages are, and means to connect said air box with a carburetor. I

4. In an air cleaner, the combination of an air tube having a forwardly flaring front end and a rearwardly flaring rear end, the walls of which rear end are madeup of alternately placed oppositely inclined conical rings whereof certain of the rearwardly flaring rings have air passages through them, an inner air tube arranged concentrically within the forwardly'flaring front end of the outer air tube which inner air tube is of such shape that the annular space between the tubes is of decreasing width'from the front to the rear thereof, and an air box surrounding that part of the air tube in which the air passages are.

5. In an air cleaner, the combination of an air tube having a forwardly flaring front end and a rear end through whose walls are a plurality of air passageways, an inner air tube arranged concentrically within the forwardly flaringfront end of the outer tube,-which inner air tube is of such shape are, and means for connecting said air box with the carbureter. 6.' In an air cleaner, the combination of an an tube havmg a forwardly flaring front end and a rearwardly flaring rear end, the walls of which are composed of a plurality of alternately disposed oppositely inclined conical rings, of which certain of the rearwardly flaring rings are formed of Wire gauze, an inner air tube arranged concentrically within the forwardly flaring front end of the outer air tube,said inner air tube being of such shape that the annular space between the tubes is of decreasing 10 connecting said air box with the carbureter. 15

In testimony whereof I hereunto affix my signature.

MATHEW B. MoRGAN. 

